The average gamma-ray burst X-ray flaring activity

R. Margutti*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Gamma-ray burst (GRB) X-ray flares are believed to mark the late time activity of the central engine. I compute the temporal evolution of the average flare luminosity 〈L〉 in the common rest frame energy band of 44 GRBs taken from the large Swift 5-years data base. This work highlights the importance of a proper consideration of the threshold of detection of flares against the contemporaneous continuous X-ray emission. In the time interval 30s < t < 1000 s the flare luminosity decays as (L) ∞ t -2.7±01, while the flare isotropic energy decays as E iso, flare ∞t-1.7. These results are discussed in the context of GRB hyper-accretion models.

Original languageEnglish (US)
Title of host publicationGamma Ray Bursts 2010, GRB 2010
Number of pages4
StatePublished - Sep 12 2011
EventGamma Ray Bursts 2010, GRB 2010 - Annapolis, MD, United States
Duration: Nov 1 2010Nov 4 2010


OtherGamma Ray Bursts 2010, GRB 2010
CountryUnited States
CityAnnapolis, MD


  • Bursts
  • Gamma-ray
  • Non thermal
  • Radiation-mechanism
  • X-rays

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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